I'm developing a web app running on WildFly 8.2 and I'm experiencing annoying UI responsiveness lags that I do know how to pinpoint. The lags occur shortly after loading a new page - they last about 3-4 seconds during which all UI is not responsive (such as hovering does not have effect, you cannot close the window or open DevTools)
I considered the following aspects:
code-related - angular, animations, kendo, less.js, not optimized selectors or iterators in my code, etc. Disproved - I rolled back to a very early version where I had never observed the problem (so to eliminate a hidden impact of newly introduced features), and the problem was there too.
CPU-related - restarted afresh many a time, running no extra apps - no go.
server-related
browser-related - disabled extensions and hardware acceleration setting - disproved. Chrome/FF usually silently choke, sometimes asking whether to close unresponsive page, IE complains about script, but when I choose to Debug the script, all I get is being directed to random script.
The key test however was to view my local deployment over LAN from other desktops - the app performed sluggishly regardless, whereas the same app (same code, same branch revision) deployed locally on those desktops performed superbly.
So this proved this is more server- or CPU related stuff. The app ran fine on WildFly 8.0. When the problem started to bite, I upgraded to 8.2 but it does not seem to have any effect.
As I'm running out of ideas, does anyone seem to have a hint what to do/check next?
Last minute: I went along the advice from here http://ift.tt/1EavHgk and turned off Windows Defender's real-time protection - nothing got better.
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